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- (BOOL)prefersStatusBarHidden;
假设想利用UIApplication来管理状态栏。首先得改动Info.plist的设置
UIApplication *app = [UIApplication sharedApplication];
[app setStatusBarHidden:YES withAnimation:UIStatusBarAnimationFade];
[app setStatusBarStyle:UIStatusBarStyleLightContent animated:YES];
// app.statusBarHidden = YES;
// app.statusBarStyle = UIStatusBarStyleLightContent;
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原文地址：http://www.cnblogs.com/gcczhongduan/p/4565533.html
